World of Goo on iOS is about to come full circle. After initially being announced for the iPhone/iPod touch, then released for the iPad, is now finally coming back full circle, as 2D Boy has confirmed that the iPhone/iPod touch version has been submitted to the App Store. In an interesting twist, owners of the current HD version won't have to pay again to get the iPhone/iPod touch version - the iPad version is getting updated to a universal app, so you can just re-download the game on your iPhone/iPod touch for no extra charge. It's not immediately clear if the game will be just one universal app, or if there will be 2 separate apps: the iPhone/iPod touch version and a universal version that supports the iPad natively. If it's the latter, it's something that I have advocated before on The Portable Podcast - if developers want to charge separately for an iPad version, then making it universal would be the fairest choice, so that multiple iOS device owners don't have to choose between an app that works on all their devices, or one optimized for their iPad. No matter the route 2D Boy takes, it's one that is ultimately beneficial for consumers, and I applaud them for that. World of Goo for iPhone/iPod touch will support 3rd generation (iPhone 3GS and iPod touch 3G 32GB/64GB models) and up models, and will be on sale for $0.99 for 24 hours, before going up to $2.99.